公开(公告)号：US08755636B2

公开(公告)日：2014-06-17

申请号：US13476208

申请日：2012-05-21

申请人： Xinfeng Zhang ,  Si-Wei Ma ,  Xun Guo ,  Shaw-Min Lei

发明人： Xinfeng Zhang ,  Si-Wei Ma ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： G06K9/32

CPC分类号： G06T3/4053

摘要： A method and apparatus for reconstructing a high-resolution image based on multiple low-resolution images are disclosed. The method and apparatus incorporating an embodiment according to the present invention reconstructs the high-resolution image based on a kernel regression method using a modified kernel function. The kernel function takes into consideration of registration reliability of regression residue and rotational motion within the multiple low-resolution images. The registration reliability adjusts weighting on the regression residues according to local gradient estimated between neighboring values. Furthermore, multi-scale regression residue is used to alleviate impact of noise.

摘要翻译： 公开了一种基于多个低分辨率图像重建高分辨率图像的方法和装置。 结合根据本发明的实施例的方法和装置基于使用修改的内核功能的内核回归方法来重构高分辨率图像。 核函数考虑了多个低分辨率图像内的回归残差和旋转运动的配准可靠性。 注册可靠性根据相邻值之间估计的局部梯度来调整回归残差的权重。 此外，多尺度回归残差用于减轻噪声的影响。

公开(公告)号：US20130064472A1

公开(公告)日：2013-03-14

申请号：US13476208

申请日：2012-05-21

申请人： Xinfeng Zhang ,  Si-Wei Ma ,  Xun Guo ,  Shaw-Min Lei

发明人： Xinfeng Zhang ,  Si-Wei Ma ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： G06K9/32

CPC分类号： G06T3/4053

摘要： A method and apparatus for reconstructing a high-resolution image based on multiple low-resolution images are disclosed. The method and apparatus incorporating an embodiment according to the present invention reconstructs the high-resolution image based on a kernel regression method using a modified kernel function. The kernel function takes into consideration of registration reliability of regression residue and rotational motion within the multiple low-resolution images. The registration reliability adjusts weighting on the regression residues according to local gradient estimated between neighboring values. Furthermore, multi-scale regression residue is used to alleviate impact of noise.

摘要翻译： 公开了一种基于多个低分辨率图像重建高分辨率图像的方法和装置。 结合根据本发明的实施例的方法和装置基于使用修改的内核功能的内核回归方法来重构高分辨率图像。 核函数考虑了多个低分辨率图像内的回归残差和旋转运动的配准可靠性。 注册可靠性根据相邻值之间估计的局部梯度来调整回归残差的权重。 此外，多尺度回归残差用于减轻噪声的影响。

公开(公告)号：US09565428B2

公开(公告)日：2017-02-07

申请号：US14123094

申请日：2012-06-15

申请人： Mei Guo ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC分类号： G06K9/36 ,  G06K9/46 ,  H04N19/105 ,  H04N19/96 ,  H04N19/593 ,  H04N19/136 ,  H04N19/186 ,  H04N19/182 ,  H04N19/433

CPC分类号： H04N19/105 ,  H04N19/136 ,  H04N19/182 ,  H04N19/186 ,  H04N19/433 ,  H04N19/593 ,  H04N19/96

摘要： A method and apparatus for chroma intra prediction for a current chroma block with reduced line memory requirement are disclosed. The chroma intra predictor is derived from reconstructed luma pixels of a current luma block using a model with parameters. In various embodiments according to the present invention, the derivation of the parameters relies on a reconstructed luma pixel set corresponding to neighboring reconstructed luma pixels from causal luma neighboring areas of the current luma block, wherein said causal luma neighboring areas include a first area corresponding to reconstructed luma pixels above a horizontal luma block boundary on a top side of the current luma block, and wherein the reconstructed luma pixels from the first area that are included in the reconstructed luma pixel set are from a luma pixel line immediately above the horizontal luma block boundary.

摘要翻译： 公开了一种具有减少的行存储器要求的当前色度块的色度帧内预测的方法和装置。 色度内预测器是使用具有参数的模型从当前亮度块的重建亮度像素导出的。 在根据本发明的各种实施例中，参数的推导依赖于对应于来自当前亮度块的因果亮度相邻区域的相邻重建亮度像素的重构亮度像素集，其中所述因果亮度相邻区域包括对应于 在当前亮度块的顶侧上的水平亮度块边界上方的重建亮度像素，并且其中包括在重建亮度像素组中的来自第一区域的重建亮度像素来自水平亮度块正上方的亮度像素线 边界。

公开(公告)号：US20140119439A1

公开(公告)日：2014-05-01

申请号：US14123201

申请日：2012-04-18

申请人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N19/593

CPC分类号： H04N19/105 ,  H04N19/00763 ,  H04N19/11 ,  H04N19/157 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91

摘要： Method and apparatus for intra prediction mode coding and decoding are disclosed. In one embodiment, the encoding and decoding process assigns individual indices and codewords to DC mode and Planar mode respectively. The flag is set if the current intra prediction mode is equal to any of one or more neighboring intra prediction modes. Variable length codes are designed for a remaining mode set. If the flag is not set, the currently intra prediction mode is encoded using the variable length codes. In another embodiment, multiple most probable modes are used. If the current intra prediction mode is not equal to any of the multiple most probable modes, the current intra prediction mode is encoded using variable length codes designed for the corresponding remaining modes according the ranking order of the remaining modes.

摘要翻译： 公开了用于帧内预测模式编码和解码的方法和装置。 在一个实施例中，编码和解码过程分别将各个索引和码字分配给DC模式和平面模式。 如果当前帧内预测模式等于一个或多个相邻帧内预测模式中的任何一个，则设置该标志。 可变长度代码是为剩余模式设计的。 如果标志未被设置，则使用可变长度码对当前帧内预测模式进行编码。 在另一个实施例中，使用多个最可能的模式。 如果当前帧内预测模式不等于多个最可能模式中的任何一个，则根据剩余模式的排序顺序，使用针对相应的剩余模式设计的可变长度码来对当前帧内预测模式进行编码。

公开(公告)号：US20140092980A1

公开(公告)日：2014-04-03

申请号：US14123095

申请日：2012-06-20

申请人： Mei Guo ,  Xin Zhao ,  Xun Guo ,  Shaw-Min Lei

发明人： Mei Guo ,  Xin Zhao ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N7/36 ,  H04N7/34

CPC分类号： H04N19/105 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182 ,  H04N19/593

摘要： A method and apparatus for intra prediction for a current block using directional intra prediction based on neighboring pixels around the current block are disclosed. Embodiment according to the present invention derives the gradient for the current pixel from the neighboring reconstructed pixels along a prediction direction of directional intra prediction. The gradient derived is used to form the final intra prediction. In another embodiment of the present invention, the intra prediction for slant vertical and horizontal directions is derived based on the neighboring reconstructed pixels in a neighboring row adjacent to the top side of the current block and the neighboring reconstructed pixels in a neighboring column adjacent to the left side of the current block.

摘要翻译： 公开了一种使用基于当前块周围的相邻像素的使用定向帧内预测的当前块的帧内预测的方法和装置。 根据本发明的实施例从沿着定向帧内预测的预测方向的相邻重建像素得到当前像素的梯度。 导出的梯度用于形成最终帧内预测。 在本发明的另一个实施例中，基于与当前块的顶侧相邻的相邻行中的相邻重建像素和邻近的相邻列中的邻近重建像素，导出用于倾斜垂直和水平方向的帧内预测 当前块的左侧。

公开(公告)号：US20130322527A1

公开(公告)日：2013-12-05

申请号：US13985779

申请日：2012-12-14

申请人： Xun Guo ,  Shaw-Min Lei

发明人： Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N7/26

CPC分类号： H04N19/124 ,  H03M7/3059 ,  H04N19/126 ,  H04N19/132 ,  H04N19/136 ,  H04N19/146 ,  H04N19/18 ,  H04N19/184 ,  H04N19/44 ,  H04N19/60

摘要： A method and apparatus for clipping a transform coefficient are disclosed. Embodiments according to the present invention avoid overflow of the quantized transform coefficient by clipping the quantization level adaptively after quantization. In one embodiment, the method comprises generating the quantization level for the transform coefficient of a transform unit by quantizing the transform coefficient according to a quantization matrix and quantization parameter. The clipping condition is determined and the quantization level is clipped according to the clipping condition to generate a clipping-processed quantization level. The clipping condition includes a null clipping condition. The quantization level is clipped to fixed-range represented in n bits for the null clipping condition, where n correspond to 8, 16, or 32. The quantization level may also be clipped within a range from −m to m−1 for the null clipping condition, where m may correspond to 128, 32768, or 2147483648.

摘要翻译： 公开了一种用于剪切变换系数的方法和装置。 根据本发明的实施例通过量化后自适应地削减量化电平来避免量化变换系数的溢出。 在一个实施例中，该方法包括通过根据量化矩阵和量化参数量化变换系数来产生变换单元的变换系数的量化级。 确定剪切条件，并根据剪切条件限制量化级别，以产生削波处理的量化级别。 剪切条件包括零剪切条件。 量化电平被削减到用于零削波条件的n位表示的固定范围，其中n对应于8,16或32。量化电平也可以在-m至m-1的范围内被修剪为零 剪切条件，其中m可以对应于128，32768或2147483648。

公开(公告)号：US20110116546A1

公开(公告)日：2011-05-19

申请号：US12865125

申请日：2010-06-23

申请人： Xun Guo ,  Kai Zhang ,  Yu-Wen Huang ,  Chih-Ming Fu ,  Shaw-Min Lei

发明人： Xun Guo ,  Kai Zhang ,  Yu-Wen Huang ,  Chih-Ming Fu ,  Shaw-Min Lei

IPC分类号： H04N7/32

CPC分类号： H04N19/523 ,  H04N19/117 ,  H04N19/176 ,  H04N19/80

摘要： A method for performing single-pass adaptive interpolation filtering in order to code a bitstream includes: receiving the video frames; selecting an interpolation filter from a competitive filter set; performing motion prediction on a current frame of the video frame utilizing the interpolation filter; encoding the current frame into the bitstream; and updating the competitive filter set.

摘要翻译： 一种用于执行单遍自适应内插滤波以便对比特流进行编码的方法包括：接收视频帧; 从竞争性滤波器组中选择插值滤波器; 使用内插滤波器对视频帧的当前帧执行运动预测; 将当前帧编码到比特流中; 并更新竞争性过滤器集合。

公开(公告)号：US10070126B2

公开(公告)日：2018-09-04

申请号：US14123201

申请日：2012-04-18

申请人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N19/593 ,  H04N19/70 ,  H04N19/463 ,  H04N19/91 ,  H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/157

摘要： Method and apparatus for intra prediction mode coding and decoding are disclosed. In one embodiment, the encoding and decoding process assigns individual indices and codewords to DC mode and Planar mode respectively. The flag is set if the current intra prediction mode is equal to any of one or more neighboring intra prediction modes. Variable length codes are designed for a remaining mode set. If the flag is not set, the currently intra prediction mode is encoded using the variable length codes. In another embodiment, multiple most probable modes are used. If the current intra prediction mode is not equal to any of the multiple most probable modes, the current intra prediction mode is encoded using variable length codes designed for the corresponding remaining modes according the ranking order of the remaining modes.

公开(公告)号：US09762925B2

公开(公告)日：2017-09-12

申请号：US12405250

申请日：2009-03-17

申请人： Chih-Ming Fu ,  Xun Guo ,  Kai Zhang ,  Yu-Wen Huang ,  Shaw-Min Lei

发明人： Chih-Ming Fu ,  Xun Guo ,  Kai Zhang ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC分类号： H04N7/12 ,  H04N11/00 ,  H04N19/523 ,  H04N19/147 ,  H04N19/46 ,  H04N19/117 ,  H04N19/19 ,  H04N19/82 ,  H04N19/436 ,  H04N19/176 ,  H04N19/142 ,  H04N19/433 ,  H04N19/86

CPC分类号： H04N19/523 ,  H04N19/117 ,  H04N19/142 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/433 ,  H04N19/436 ,  H04N19/46 ,  H04N19/82 ,  H04N19/86

摘要： A video encoder that utilizes adaptive interpolation filtering for coding video data includes a prediction unit, a reconstruction unit, a reference picture buffer, a filter parameter estimator for estimating filter parameters according to the original video data and the predicted samples, and an adaptive interpolation filter for utilizing the stored filter parameters to perform filtering on the reconstructed video data.

公开(公告)号：US20120177112A1

公开(公告)日：2012-07-12

申请号：US13171858

申请日：2011-06-29

申请人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

发明人： Mei Guo ,  Xun Guo ,  Shaw-Min Lei

IPC分类号： H04N7/26

CPC分类号： H04N19/182 ,  H04N19/11 ,  H04N19/13 ,  H04N19/186

摘要： A method and apparatus for improved intra chroma prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra coding modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. Furthermore, a Luma_mode has also been used in intra prediction of chroma component to further improve the performance in the High Efficiency Video Coding (HEVC) standard being developed. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. Spatial features in a picture often exist in both luma and chroma components. The intra luma prediction mode and intra chroma prediction mode will have high probability to be the same. Accordingly, an embodiment according to the present invention adaptively assigns variable length codes to a set of mode symbols associated with intra chroma prediction by assigning a shortest code to the Luma_mode. Luma_mode not only can be the best luma mode of the corresponding luma block but also can be selected from several corresponding luma modes. The maximum length of chroma prediction codes is decreased by one bit when Luma_mode is equal to one of frequent modes. The coding efficiency of arithmetic coding of chroma prediction codes is further improved by selecting the context upon neighboring blocks.

摘要翻译： 公开了一种用于改进的帧内色度预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 实际上，将图像划分成块，并且以块为基础执行帧内模式预测。 在较新的编码系统中，已经使用诸如垂直模式，水平模式，直流模式和对角线模式的多个帧内编码模式来提高帧内编码的编码效率。 此外，Luma_mode也被用于色度分量的帧内预测，​​以进一步提高正在开发的高效率视频编码（HEVC）标准中的性能。 然而，用于帧内预测的模式选择信息必须被传送到解码器以进行正确的操作。 图片中的空间特征通常存在于亮度和色度分量中。 内部亮度预测模式和内部色度预测模式将具有相同的概率。 因此，根据本发明的实施例通过向Luma_mode分配最短代码来自适应地将可变长度代码分配给与帧内色度预测相关联的一组模式符号。 Luma_mode不仅可以是对应亮度块的最佳亮度模式，还可以从几个相应的亮度模式中选择。 当Luma_mode等于频繁模式之一时，色度预测码的最大长度减少一位。 通过选择相邻块的上下文，进一步提高色度预测码的算术编码的编码效率。